Spool unit for electromagnetic talking machines



' s. BEGUN July r2'7, 1937.`

SPOOL UNIT FOR ELECTROMAGNETIC TALKING MACHINES Filed Mai-oh 12, 1935 n. l l 1/ I l u v Patented July y27, d1937 c 2,088,047 y l ,V

sroox. UNIT Fon ELECTvRoM.iiG.Nn'.lIcY` I TALKING MAcHiNEs Semi Begun, Berlin,` Germany, assigner to C. Lorenz Aktiengesellschaft, BerlinTempelhoL Germany Application March 12, 1935, SerialNo. 10,630

lIn Germany March 10, 1934` v 4 Claims.

Electromagnetic talking machines or telegraphones are known whose spools carrying the sound-recording steel wire or tape are in pairs mounted yin a frame or casing, so that each of these sets of spools can be readily replaced by another set. o o

The sets of spools should be adapted to be stored in a convenient manner, in order that any number of records, each impressed on av wire or tape, may be collected and thus be ready for `reproduction at any time. Containers or boxes of special `construction have been employed to such end. A

The invention avoids the necessity for means of this nature.` The arrangement here proposed is cheaper and occupies less place than prior ones.

' In the novel arrangement the sets of spools are so constructed that they can be placed one above the other without being liable to become displaced horizontally with respect to each other.A

One embodiment of the invention is described hereafter by way of example, reference being had to the accompanying drawing in which Fig. 1 is a sectional elevation of superposed sets of spools, these sets being constructed in accordance with the invention, Fig. 2 shows a section through this arrangement onlthe line 2'-2 of Fig. 1.

The spools intended to receive the recording wire or tape in a well-known manner are designated A and B. Theyare rotatably suspended fromv a frame piece C which in the case shown consists of a plate but may be of any other suitable configuration. 'I'he pairs of spools A, B

" are secured to the frames' C by rivet-shapedv bodies D having heads E adapted to be received by hollows F of the spools A, B. The recording body is not shown.

When one of the sets of spools is placed on another in the manner seenin Fig. 1, the two heads E of the lower set enter the hollows `1i of the upper set and then act to prevent the sets from getting displaced horizontally with respect to each other. In this way, any desired number of sets may be stored up without the aid of containers or any other means separate from the sets of spools.

What is claimed is:

1. 'Ihe combination of two record bearing units for electromagnetic talking machines, each of said units comprising a frame and spoolssuspended from one side of said frame, the frame of one of said units having projections and the 5 spools of the other of said units having re-l cesses, said projections being adapted to engage said recesses when said two units are` placed together and the spools of said second mentioned unit being adapted to contact the frame of said 1o -rst mentioned unit in a suitable manner whereby said two units when stacked together are adapted to be held in substantially fixed relationship.

2. A spool unit for electromagnetic` talking l5 machines, comprising a set of spools and a plate member adapted to carry said setof spools, said n spools being rotatably secured by fastening means to said plate member, a second set of spools provided with recesses, said fastening -20 means extending to the other side ofthe plate member to engage the spool recesses of said second set of spools when said sets are stackedl directly upon each other.

3. The combination of tworecord bearing units 25 for electromagnetic talking machines, each of `said units comprising a frame plate and twov spools rotatably suspended from one side of said plate by fastening means extending through said plate, the fastening means of one of said units 30 forming projections o n the side of the plate remote from said spools, the spools of the other of said units having recesses at the ends remote from the fastening plate, said projections being adapted to engage said recesses when said two 35 units are'placed together.

, 4. A spool unit for electromagnetic talking machines comprising a set of spools rotatably securedA to a frame piecev by fastening means extending through said frame piece, said fasten- 40 ing means and saidy spools formingtop nesting portions and bottom nesting portions for said unit, the top nesting portions of said unit being adapted to so engage the bottom` nesting of another similar yunit when said other unit is 45 placed on top of said rst unit that the two units are held against relative motion.

- SEMI BEGUN.

FICE' l p 

